Answer
$\sqrt[3] a$
Work Step by Step
$\sqrt[9] (a^{3})=a^{\frac{3}{9}}=a^{\frac{1}{3}}=\sqrt[3] a$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.2 - Rational Exponents - Exercise Set - Page 425: 74
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